Apparatus for continuous forming of strip material



July 1, 1969 r Y B, VIHL 3,452,568

APPARATUS FOR CONTINUOUS FORMING OF STRII: MATERIAL Filed Jan. s1,- 1967Sheet of 8 INVENTOR.

' BER/VHA/PD V/HL A TTOR/VE Y July 1, 1969 v 3,452,568

APPARATUS FOR CONTINUOUS FORMING OF STRIP MATERIAL Filed Jam-31, 1967Sheet 5 of 8 INVENTOR. v HERA/HARD V/HL ATTORNEY Sheet .F aw i a l m uan H m 1 INVENTOR. BERNHARD V/HL BY July 1, 1969 a. vu-n.

APPARATUS FOR- CONTINUOUS FORMING OF STRIP MATERIAL Filed Jan. 31, 1967fih m1 V will?! m I B ANN Mew \Mm Ql mm a. Q T m m w I m h July 1, 1969APPARATUS FOR CONTINUOUS FORMING 0F STRIP MATERIAL Sheet 4 of8 FiledJan. 31, 1967 Q% a a I N VEN TOR. BERN/MR0 V/HL ZZeMZ A ro/m5) July 1,1969 B. VlHL 3,452,568

.APPARATUS FOR CONTINUOUS FORMING OF STRIP MATERIAL Filed Jan. 31, 1967I Sheet 5 of s INVENTOR. BER/VHA/PD V/HL /ZMZ 8% A r TOR/V5) B. VIHLJuly 1, 1969 APPARATUS FOR CONTINUOUS FORMING OF STRIP MATERIQAL Sheet 6of8 Filed Jan. 31, 1967 INVENTOR. BERNHARD V/HL ATTORNEY B. VIHL July 1,1969 APPARATUS FOR CONTINUOUS FORMING OF STRIP MATERIAL Sheet L of 8Filed Jan 31, 1967 INVENTOR, HERA/HARD V/HL July 1, 1969 B. W. 3,452,568

APPARATUS FOR CONTINUOUS FORMING OF STRIP MATERIAL Filed Jan. 31, 1967Sheet 6 of 8 I N VEN TOR. HERA/HARD V/l-IL /EMA?! A rrak/vsr PatentedJuly 1, 1969 3,452,568 APPARATUS FOR CONTINUOUS FORMING F STRIP MATERIALBernhard Vihl, 2 Glenwood St., Clifton, NJ. 07011 Filed Jan. 31, 1967,Ser. No. 612,925 Int. Cl. B21f 35/02; B21b 15/00; B21c 19/00 U.S. Cl.72-137 Claims ABSTRACT OF THE DISCLOSURE An apparatus having a series ofpairs of mated, axially parallel rolls contoured to change progressivelythe transverse configuration of a continuous strip of material such as astrip of steel passed between mating rolls, and which in each pair ofrolls has one roll movable by means of a single adjusting device forvariation of the axial spacing of the rolls with this adjusting deviceproviding even and simultaneous shifting of bearings at either end ofthe axially movable roll. Additionally an apparatus as described havinga pair of mated rolls on a mounting variable in both elevation andangular orientation whereby the strip of material fully changed intransverse configuration may be straightened if naturally inclined to belongitudinally curved, or else coiled into a helix of controllablediameter with a given surface of the strip being wound to either theinside or the outside of the helix as desired.

BACKGROUND OF THE INVENTION It is 'knO'Wn in the art of the transverseforming of strip material, especially material such as steel, to pass ordrive the material continuously between matingly contoured forming rollsarranged in a series of pairs of axially parallel rolls whereby thetransverse configuration of the strip is progressively changed, usuallyfrom a flat configuration to some other configuration such as, forexample, a 'U-shape. The pairs of rolls, at least some of which may bepower driven, are frequently arranged on a common foundation to make adetermination overall apparatus for continuous forming of stripmaterial. To give the apparatus a degree of flexibility in handlingstrip material over a range of thicknesses thereof, as well as to allowthe material to be threaded easily through the apparatus initially, itis customary to have one roll of each pair of rolls movable with respectto the other in a manner allowing the distance between their axes ofrotation to be either increased or decreased.

So far as the mounting of the forming rolls in known apparatus isconcerned, two systems are frequently employed. In one of these systemsthe shafts of a pair of forming rolls are supported in cantileverfashion in bearings at one end only. The support bearing of one shaft,usually a lower shaft, may be fixedly located with respect to theapparatus foundation while the support bearing of the other shaft,usually an upper shaft, is guidedly movable vertically with respect tothe foundation with movement being effected by an adjusting screw. Attheir other or unsupported ends the shafts carry bearings around whichis fitted a yoke with a take-up mechanism such as a clamping screw tohold the free or outboard bearings in spaced relation one to anothercorresponding to the spacing of the inboard or support bearings. In thissystem there is at least some possibility of uneven adjustment of therolls of a given pair of rolls so far as maintaining the axes of theserolls in a state of true parallelism is concerned, with the result of anuneven distribution of pressure between the rolls across the stripmaterial being formed. This is inherent in the fact that separatespacing or clamping adjustments must be made between the bearings ateither end of the forming roll shafts. This uneveness can easily beresponsible for undesirable irregularities in finish and contour of theformed strip.

In the other frequently employed system of mounting, the shafts of apair of forming rolls are each supported at both ends in bearings set inthe overall apparatus foundation or framework. The bearings of oneshaft, usually a lower shaft, may be fixedly located with respect to theapparatus foundation while the bearings of the other shaft, usually anupper shaft, are guidedly movable vertically with respect to thefoundation with movement of these bearings being effected by separateadjusting screws. This system, similarly to the cantilever system justdescribed, has inherent in it the possibility of uneven adjustment ofthe rolls of a pair of rolls so far as their parallelism and thepressure they exert on strip material between them are concerned in viewof the separate bearing adjustments.

U.S. Patent No. 1,574,397 to C. W. Kirsch discloses a metal formingmachine in which at each forming station there is a yoke and thrust pinmeans whereby pressure may be exerted upon both bearings of an upperforming roll shaft of the metal forming machine through the turning of asingle adjusting screw extending through the yoke and through a platelying across the top of a pair of side plates in which the forming rollshaft bearings or bearing housings are carried. Kirsch does, however,have some lack of rigidity in his system, actually of an intentionalnature, as he provides a sphere-convex rocking surface between the bendof his adjusting bolt and his yoke. Thus Kirsch does not insure anabsolutely even pulling or pushing down of his upper forming roll as hissingle adjusting bolt is turned at any forming station in his apparatus.

It is also known in the art of the transverse forming of strip materialto provide an apparatus such as that of the general kind shown by Kirschwith a mechanism or further apparatus assembly at its discharge or exitend whereby the fully transversely formed strip material may be formedor deflected longitudinally to take on the configuration of a coil, thatis, in at least some cases, be wound into a helix. The apparatuses foreffecting longitudinal forming of strip material associated with thoseto effect a transverse forming thereof are customarily of a nature towind or coil the transversely formed strip material in only onedirection; that is, supposing the material has been transversely formedinto a U-shape, the known apparatus for effecting longitudinal formingof it may be expected to be capable of winding it into a helix onlywhere the open side of the strip is either always concave to the insideof the helix or else always concave to the outside thereof.

3 SUMMARY, OBJECTS, AND DETAILED DESCRIPTION OF THE INVENTION Accordingto the present invention there is provided an apparatus for continuousforming of strip material in which a series of pairs of upper and lowerrolls for elfecting transverse forming of strip material are supportedin and on a channel-like base or frame. More specifically, the shaft ofeach of a majority of the lower forming rolls is supported at eitherside of its roll in bearings set in the side plates of the frame. Thebearings of the shaft of each upper forming roll above a lower formingroll of the aforesaid majority are, on the other hand, set in bearingblocks from which guide posts come vertically downwardly through closelyand accurately dimensioned and aligned holes in the side plates and baseplate of the frame, and are finally joined below the base plate in asingle yoke-like plate in the nature of an adjusting plate. Theseplates, one of which is individually associated with each of the upperforming rolls mentioned above, each have an adjusting screw threadedvertically and centrally through them. At its upper end above itsadjusting plate each such screw is shouldered or headed, and rotatablyretained in a closely fitting collar on the underside of the base plateof the apparatus frame. At its lower end below its adjusting plate eachsuch screw is provided with a head or other means whereto a turningdevice such as a wrench may be applied for raising or lowering theadjusting plate and the guide rods, bearing blocks, bearings, shaft, andupper forming roll mounted on it in what is effectively a single veryrigid and very accurately aligned and guided assembly or sub-assembly.

Further this invention provides form rolls in a series of mated pairs ofupper and lower rolls in each of which the individual rolls are socontoured that strip material passing between them will be formedtransversely in essentially pure bending and not stretched or thinned,that is, not subjected to rolling in the usual mechano-metallurgicalsense of the word. More specifically, all of the lower forming rolls atthe stations where significant amounts of transverse deflection orbending of the strip material is effected are provided with step-likeshoulder portions at their outer ends which arrest the downward movementor adjustment of the corresponding upper forming rolls before the stripshaping opening or cavity between the rolls of any given pair of formingrolls can be closed up. Desirably, the raised height of the shoulderportions is essentially equal to the thickness of the strip materialwhich is to be formed while the transverse length of the limiting cavitybetween any mated pair of upper and lower forming rolls, measuredsinuously right along the cavity contour, is essentially equal to theoriginal width of the strip material as a fiat strip.

Still further this invention provides an apparatus for continuousforming of strip material which includes an apparatus assemblyforforming or bending the material longitudinally into a coil or helixafter the material has been fully formed transversely, this assemblybeing adjustable to generate a helix in which a given original surfaceof the strip material is wound either to the inside or the outside ofthe helix, as desired. In this assembly there are upper and lower rollshaving contours respectively the same as those of the upper and lowerrolls of the last pair of rolls for effecting transverse forming. Thelongitudinal forming or bending rolls have a common, verticallyadjustable mounting which allows them to be moved as a pair to be eithersomewhat higher or somewhat lower than, or indeed at essentially justthe same height as the last pair of transverse forming rolls.Additionally, the upper longitudinal bending roll is mounted on swingarms rotatable with respect to the axis of the lower longitudinalbending roll, and thus may be swung relatively nearer to or further awayfrom the last upper transverse forming or bending roll depending onwhich way the helix of transversely formed strip material is desired obe wo nd. The upper longit d n l endi g roll i 4 controllably movablealong the swing arms so that the spacing bet-ween its axis and that ofthe lower longitudinal bending roll may be adjusted in keeping with thethickness of the strip material being run through the apparatus and anypertinent considerations of the direction and radius of the longitudinalbend being made.

It is thus an object of the present invention to provide, and it doesprovide, an apparatus for continuous forming of strip material in whichthere is a unique and highly accurate and evenly workingsingle-adjustment means and system for controlling the spacing andpressure between the rolls of a mated pair of transverse forming rolls.

It is thus another object of the present invention to provide, and itdoes provide, an apparatus for continuous forming of strip material inwhich the rolls of mated pairs of transverse forming rolls areconfigured to effect forming of appropriately originally sized materialin essentially only a bending mode.

It is thus another object of the present invention to provide, and itdoes provide, an apparatus for continuous forming of strip material inwhich there is a unique and easily adjustable means for bendingtransversely formed strip material longitudinally and coiling ithelically to have a given one of its original surfaces wound facingeither into or away from the helix according to the chosen adjustment ofthis means.

These and other objects and advantages of the present invention as wellas its nature and substance will be more clearly perceived and fullyunderstood by referring to the following description and claims taken inconnection with the accompanying drawings in which:

FIG. 1 represents an isometric view showing the general arrangement ofthe apparatus and wherein the strip stock is shown being fed from asupply reel;

FIG. 2 represents a plan view of the apparatus of FIG. 1 with its coverremoved looking downwardly in the direction of the arrows of line 22 inFIG. 3, and showing the arrangement of the strip forming pathway and themeans for driving the rolls and certain pairs of rolls forming thispathway;

FIG. 3 represents a side elevation view of the apparatus of FIG. 2showing the general arrangement of the components of the strip formingapparatus of the present invention;

FIG. 4 represents a longitudinal sectional view taken on line 4-4 inFIG. 2 looking in the direction of the arrows, and showing the path ofthe strip of stock through the pairs of forming roll stations andthrough the general arrangement of the rolls leading into and out of thepath of the forming apparatus;

FIG. 5 represents a transverse sectional view in enlarged scale of aportion of the forming section of the apparatus of this invention takenon the line 5-5 in FIG. 2 looking in the direction of the arrows;

FIG. 6 represents a transverse sectional view in enlarged scale ofanother portion of the forming section of the inventive apparatusupstream from the section of FIG. 5 taken on the line 6-6 in FIG. 4looking in the direction of the arrows;

FIG. 7A through FIG. 76 represent a sequence of somewhat diagramaticsectional views through each of the successive pairs of rolls formingthe guiding and bending stages of the apparatus of this invention;

FIG. 8 represents an exploded isometric view showing a typicalarrangement of components including and associated with one intermediatepair of rolls forming one stage of the strip contouring apparatus;

FIG. 9 represents an exploded isometric view showing the relativearrangement of the components comprising the upper portion of the stripcurving apparatus of FIG. 10;

FIG. 10 represents a side view in slightly enlarged scale of thedischarge end of the apparatus of FIG. 2 showing the adjustableapparatus providing means for longitudinally curving or straighteningthe strip of material after it is formed;

FIG. 11 represents a plan view partly in section of an alternatelongitudinal strip curving means taken along line 1111 in FIG. 13looking in the direction of the arrows;

FIG. 12 represents a front view of the alternate longitudinal stripcurving means of FIGS. 11 and 13 taken along line 1212 in FIG. 13looking in the direction of the arrows, and

FIG. 13 represents a side view of the alternate adjustable means ofFIGS. 11 and 12 for longitudinally curving, or straightening, formedstrip material leaving the discharge end of the apparatus shown in FIG.2.

Referring now to the drawings in detail in which like numbers designatelike members throughout the several figures, it is to be noted that theapparatus of FIG. 1 includes a general base within which is mounted agear motor 22 whose shaft carries a drive sprocket 23 which is connectedby a roller chain 24 extending up wardly to a driven sprocket 25. Thisdriven sprocket is carried on and rotates a drive shaft 27 through whichthe entire forming operation is powered. A reel 28 supported androtatably retained by stand 29 carries a coil of flat strip material 30to be formed. This material may, according to an actual utilization ofthe present invention, preferably be a strip of stainless steel aboutfive and oneeighth inches wide and about one-eighth of an inch thick ornominally eleven or ten gauge. From this coil of material 30 an unwoundstrip 32 is fed to and through a forming station which is normallyprotected by a cover 34 to prevent dirt from entering the apparatus andmarring the material and also to act as a safety guard for the rotatingmechanism therein and the power driving apparatus which in theillustrated apparatus is on the outer end of the forming roll shafts andis described hereinafter. The discharge portion of the apparatus has astrip deflecting assembly 35 which is adjustable to provide the finallongitudinal alignment or coiled arrangement of the formed or contouredstrip 36.

Referring next to FIGS. 2, 3, and 4 it is to be noted that unwound strip32 after leaving coil 30 is first brought to and through a guide rollsection 40 which includes a frame 41 carrying upper and lower straightor constant diameter rolls 42 and 43 and having a pair of freelyrotatable lateral guide rolls 45 and 46 on each side of the frame so asto define the side-to-side position of the path of the strip. Frame 41carries rolls 42 and 43 in a fixed and precisely determined position soas to define the entry of a selected pathway for the strip material 32.This pathway is above and generally parallel to a base plate 48 whichextends the length of the apparatus and is mounted upon or carried by achannel iron frame 49 forming the upper portion of the general base 20.Adjacent to and downstream from guide roll section 40 is a preliminaryor first contouring or forming or forming roll section 50 which includesa frame 51 carrying lateral guide rolls 52 and 53 and an upper roll 54and a lower roll 55 both fixedly positioned and precisely located andfreely rotatable in bearings mounted in the side plate portions of frame51. Upper roll 54 has a convex arcuate center portion while lower roll55 has a mating concave arcuate center portion. These rolls are spacedapart an amount equal to the thickness of the strip material so as topermit the strip 32 to pass between them and have a preliminary bendformed in its central portion according to their mated contours.

A precise positioning of the pair of rolls 54 and 55 in relation torolls 42 and 43 and base plate 48 generally defines the preferred planeof the path of travel of strip 32 as it is being contoured. Nextdownstream and to the left of the first contouring section 50 is apowered contouring or forming section 56 having at its inlet end a setof lateral guide rolls 57 and 58. These guide rolls are precisely spacedto accommodate the now slightly reduced width of the partially curvedstrip 32 as it is brought from the preliminary or non-powered formingsection 50 into the powered forming section 56. Within and constitutingpart of powered forming section 56 of the apparatus there are attachedto and supported upon base plate 48 a pair of lower side plates 60 and61 which extend the full length of the powered forming section. Carriedin these lower plates are five fixedly spaced lower rolls having concavecenter portions of precise contour. These rolls are hereinafterdesignated as lower female rolls 62, 63, 64, 65, and 66-.correspondingly mounted above these lower rolls are matingly contouredupper male rolls 68, 69, 70, 71, and 72, each of which is carried on ashaft whose ends are mounted in bearings set in vertically movableblocks. These upper rolls are maintained in precise alignment andparallelism with mating lower rolls 62 through 66 in a manner describedhereinafter. Between each of the lower rolls and acting as a spacer andsupport means for the side plates 60 and 61 are transverse bracingblocks 74.

Particularly clearly shown in FIG. 4 are five substantially equallyspaced adjusting screws 76 which have their upper ends formed withround, flat-headed shoulder portions of enlarged diameter and which arerotatable against the undersurface of base plate 48. The lower end ofeach screw 76 has a square head for application of a wrench or otherturning device. Threadedly engaging and carried on each adjusting screw76 is a plate 77 and below these plates on each screw there is a locknut 78. The upper end of each adjusting screw 76 is rotatably retainedagainst base plate 48 by means of a collar 80 which is attached to plate48 by cap screws or other conventional means not shown.

Referring next to FIG. 5, a typical transverse bracing block 74 betweenside plates 60 and 61 is formed with a concave upper central portion 81sized to allow the free passage thereabove of the contoured strip 32.The strip as it is advanced is depressed and shaped in its upper surfaceby upper roll 70 and is shaped and supported on its lower surface bylower roll 64. Maintenance of strip 32 in a proper side-to-side positionwithin the confines of the formation path is effected by lateral guidemeans in the form of idler rolls 82 and 83 mounted on block 74. Theserolls are sized and positioned so as to just permit the passage betweenthem of the edges of the strip 32.

Referring next to FIG. 6 in which a sectional view is taken through theforming rolls of one station typical of the apparatus, it is to be notedthat the shaft of the upper forming roll 70 is carried in rollerbearings 84 set in suitable bearing blocks. The shaft of the matinglower roll 64 is carried in like roller bearings 85 set in side plates60 and 61. The outwardly extending portions of the forming roll shaftsbeyond side plate 61 each carry a shaft nut 86 for transverse retention.Also seen are base plate 48, adjusting screw 76, collar 80, and plate 77which carries guide posts hereinafter identified and described indetail.

Referring next to FIGS. 7A through 76, the first view, FIG. 7A,represents the relationship of the straight, non-powered rolls 42 and 43to the passage therebetween of the fiat strip 32. FIG. 7B shows thefirst forming station at which the initial partial troughing or bendingof the strip is performed between upper roll 54 and lower roll 55. Thesubsequent views, those of FIGS. 70 through 7G, show further progressiveforming of strip 32 until it achieves its final transverse flanged andtrough-like configuration in its passage between rolls 72 and 66. Fromand including FIG. 7C onward it is to be noted that the lower roll ofeach pair of forming rolls is provided with step-like shoulder portionsat its outer ends with the mating upper roll running essentially incontact with these portions and the strip 32 being confined laterallybetween them. This shouldered configuration of the lower forming rollsnot only provides positive side-to-side guidance of the strip ofmaterial 32 being formed, but also prevents an unwanted reduction inthickness of the strip on account of the vertically movable upperforming rolls being lowered too far. Opposite shoulder faces onsucceeding lower rolls 62 through 66 are progressively closer togetherin conformity with the deepening of the transverse troughing of thestrip material as it passes from one pair of forming rolls to another.

A final pair of rolls downstream from rolls 72 and 66 are movablyarranged to provide a determined straightness or a longitudinalcurvature to the strip material after it is finally formed transverselyand in such condition identified as contour strip 36. These rolls are amated pair in which the upper roll and the lower roll have the sameconvex and concave configuration respectively as forming rolls 72 and66. The use of these rolls is described more fully hereinafter inconnection with the description of apparatus shown in FIGS. 9 and 10.

Referring next to FIG. 8, this exploded isometric view illustrates atransverse forming station of the apparatus which except for the preciseconfiguration of the forming rolls is quite typical of all such stationspowered by motor 22. Chosen for illustration and description is thestation including upper forming roll 72 and lower forming roll 66. Lowerroll 66 and its shaft are carried in roller bearings 85 which areprecisely located in bored holes 87 in side plates 60 and 61.Immediately above the illustrated portions of the side plates there arevertically movable bearing blocks 88 and 89 which are characterized bybores 90 sized so as to retain roller bearings 84 for the support ofupper forming roll 72 and its shaft. The ends of the forming roll shaftsare threaded to accept retaining nuts 86. After assembly, portions ofthese shafts may extend outwardly beyond one or both of side plates 60and 61 to accept drive means described hereinafter.

Each of the bearing blocks 88 and 89 is precisely bored with verticalholes 91 extending therethrough. These holes are sized and shouldered toaccept guide posts 92. Each guide post 92 is formed with a majordiameter central portion 92a and a reduced diameter upper portion 92bhaving a threaded end. Extending downwardly from central portion 92athere is a reduced diameter lower portion 926 terminating in a threadedend. Adapted to engage the threaded end 92c is a hex nut 93 and adaptedto engage the threaded end 92b is a hex socket type nut 94. In theassembly, as shown particularly in FIG. 5, each of the two guide rods 92associated with each bearing block enters the bottom of a bore 95 formedin one of the side plates, side plate 60 below block 88 and side plate61 below block 89. On each rod 92 the shoulder formed at the base ofreduced diameter upper portion 92b engages a like shoulder formed inbearing block bore 91 with the threaded end of this upper portionextending upwardly into an enlarged upper end region of bore 91. Nut 94enters into the enlarged upper end region of bore 91 and is engaged andtightened on guide rod 92 so that the shoulder at the base of portion92b of this rod is pulled up hard against the lower shoulder of bore 91.The unthreaded portions of guide rods 92 which enter bearing block bores91 are very precisely fitted within these bores.

Blocks 88 and 89 are preferably made with a high degree of accuracy sothat at least the under or lower shoulders in bores 91 are all the exactsame distance within a few tenths of a thousandth of an inch below thetheoretical center line forming the axis of the upper roll 72, that is,below the center or axial lines of bores 90 extending transversely.Corresponding accuracy in the shoulder-toshoulder distances of majordiameter central portions 92a on the guide rods insures that plate 77,which may be called a header or adjusting plate, is in a plane parallelto the axis of the movable upper forming roll. The high degree ofaccuracy of dimensions of the rods and blocks, as achieved in an actualreduction to practise of this invention, is for a purpose hereinafterdescribed. The major diameter portions 92a of the guide rods have snuglyslinding fits in precisely spaced and bored holes 95 formed in sideplates 60 and 61, and these portions 92a extend all the way through theside plates and through appropriately located clearance holes 96 in baseplate 48. The lower shoulders on the guide rods defined at thereductions of portions 921: to portions 920 seat upon the upper surfaceof adjusting plate 77, and the rod portions 92c pass down through andextend beyond closely fitting and accurately located holes 97 in theadjusting plate. The guide rods are attached and tightened onto plate 77by means of nuts 93 below the plate. After assembly, the adjusting orrotating of screw 76 Within collar causes plate 77 to be moved up anddown in response to the engagement of the screws thread in the tappedhole 98 in the plate through which it passes, and in keeping with theirrigid fixation to plate 77 the rods 92 and bearing blocks 88 and 89mounted on the guide rods are also moved up and down in precise responseto rotation of screw 76. Bearings 84 and upper forming roll 72 of coursemove vertically with the bearing blocks. Vertical adjustment of thiswhole assembly may befixed by means of lock nut 78 on screw 76.

Referring next to FIGS. 9 and 10 there is shown one embodiment of thelast or farthest downstream roll pair or station of the apparatus, theembodiment 35 depicted in FIG. 1, which station provides a means forfinal longitudinal shaping of the transversely formed strip 36.Adjustment of the rolls of this station determines whether the formedstrip is straight or curved and these rolls may be adjusted inparticular so as to insure that the flange edges of the strip formed asshown will be straight or else curved as required to lie against a tankwall around or within which the strip is wrapped before welding of itsedges thereto. This final roll station section for strip curving orstraightening includes an upper convex roll 100 which is identical incontour and size to roll 72 but differs therefrom with respect tomounting in that this roll is freely rotatable on a shaft 102 by meansof bearings 103 carried within the roll itself. Lower concave roll 104is identical in configuration and shape to roll 66 except that this rolllikewise is freely rotatable-upon shaft 105 on internally carriedbearings 106.

A support yoke 108 is made with side and bottom plates, and is assembledby screws or as a weldrnent without screws. This support yoke isprovided with transversely aligned holes 109 adapted to engage andretain the end portions of shaft 105. Each end of this shaft extendsbeyond the corresponding side plate portion of yoke 108, and each suchend extension is adapted to pivotally retain a swing arm 110 near thelower end of the arm. Arms 110 are a pair and are symmetrically shapedalthough oppositely disposed with their thickened upper end portionsoriented inwardly toward each other to provide adequate substance ormaterial for mounting an adjusting screw 111 in each of them. Thesescrews are threadedly retained in tapped holes 112 in the arms 110, andextend through and below these holes to enter vertically elongated holesor slots 114 in the swing arms within which the ends of shaft 102 areslidably retained.

In the end portions of shaft 102 there are transverse or diametral holes115 which receive the circumferentially grooved lower ends of adustingscrews 111 with a fit allowing rotation of these screws. Screws 111 areadvanced in tapped holes 112 so that their grooved ends enter holes 115,and then set screws 116 are engaged and advanced into tapped holes 17formed in each end of shaft 102, holes 17 communicating with holes 115.When the grooves in screws 111 are in way of holes 117 the screws 116are run in to enter these grooves and rotatably retain screws 111 inshaft 102. As screws 111 are rotated in tapped holes 112 the shaft 102and upper roll 100 upon it are moved back and forth or up and down inswing arm slots 14. Lock nuts 118 are used to retain fixed adjustmentsof screws 111.

Swing arms 110 are retained against outward movement on the ends oflower roll shaft 105 by means of washers 119 and cap screws 120 whichare threaded into tapped holes 121 in the ends of the shaft. Swingingadjustment of upper roll 100 in a pivotal movement of arms 110 aroundthe axis of lower roll shaft 105 is accomplished by synchronized andeven rotation of two knurlheaded adjusting screws 123. Pivot blocks 124,mounted as described hereinafter, rotatably retain the shanks of screws123 and are maintained in a fixed longitudinal relationship thereto byretaining rings 125 seated in grooves formed in the screws on eitherside of each block. Threaded pivot blocks 127 are rotatably mounted inholes 128 in each of swing arms 110, and are retained therein by meansof snap rings 129 set in circumferential grooves in the shank portionsof the blocks. In like manner, pivot blocks 124 are rotatably mounted inholes 130 formed in the side plate portions of yoke 108, and retainedtherein by means of snap rings 131.

Extending downwardly from support yoke 1-08 is a sleeve or tubularmember 132 which is bolted or otherwise suitably attached to the yoke.Within this sleeve there is disposed an adjusting screw 134 which ismaintained in an axially fixed but freely rotatable relationship to thebot tom plate of yoke 108 by means of an enlarged fiat round head on thescrew within a collar 135 on the underside of the yoke. A supportbracket 140 is attached to general base 20; and has a vertical tubularportion 141 centrally disposed in it. The inner surface of this portionserves as a retaining and bearing surface for tubular member or sleeve132 of yoke 108 to be axially movable therein. The bottom of tubularportion 141 of support bracket 140 is closed by an end plate 142 havinga centrally located tapped hole through which adjusting screw 134 passesin threadedly engaged relationship. Sleeve 132 is prevented fromrotating within tubular portion 141, and hence rotation of support yoke108 is prevented, by means of a threaded pin 143 which is retained in atapped radial hole in tubular portion 141 and extends inwardly to enterand have a close sliding fit in a vertical slot 144 in sleeve 132. Asadjusting screw 134 is rotated, therefore, sleeve 132 and support yoke108 may be moved up and down without any turning. Screw 134 may berotated by any suitable means such as a ratchet-type socket wrench shownin phantom outline.

Referring finally to FIGS. 11, 12, and 13 there is shown an alternateembodiment or assembly 149 of a means for final longitudinal shaping ordeflection of the transversely formed strip 36. As in FIGS. 9 and 10, anupper roll 100 is freely rotatable in swing arms 150 which are similarto arms 110 described above except that each arm 150 has a portionextending below its pivot hole whereat it is mounted on an end extensionof the shaft of lower roll 104. Arms 150 have slots 151 in their upperportions which are identical in size and use to slots 114. Adjustingscrews 111 are threadedly carried in the upper ends of arms 150 and moveupper roll shaft 102 as previously described. Lower roll 104 is freelyrotatably mounted on shaft 105 whose ends extend through the sides ofsupport yoke 152 and are carried in holes 154 therein. Support yoke 152is similar to support yoke 108 with the exception that pivot holes 130of yoke 108 are now holes 155 and holes 109 of yoke 108 are holes 154 inyoke 152. The extended end portions of lower roll shaft 105, asaforesaid, pivotally carry swing arms 150 as they pass through holes 156in these arms.

A rigid arm or frame member 157 in the form of a U has side members 158connected by a transverse bar 159 as by welding. Above this bar a beamor rod 160 is rotatably mounted between the outer ends of the sidemembers by pivot screws 161. The free or inwardly extending ends of thesides 158 have aligned holes 162 in their ends. Shouldered cap screws163 pass through these holes in free, rotatable fashion, and thethreaded inner ends of screws 163 are in screwed engagement with tappedholes in arms 1'50 close to the lower ends of these arms. The bodyportions of the cap screws serve to retain the sides 158 of frame member157 in pivoted relationship to swing arms 150. A rod or bar 165 ispivotally carried between the side plates of support yoke 152 byshouldered cap screws 164 in aligned holes in these plates near thefront thereof at about the normal level of screws 163. An adjustingscrew 166 is carried centrally and rotatably in bar 165. The screw 166is retained at its inner end against axial movement in bar 165 by meansof snap rings 168, and is threadedly engaged in rod or beam 160. On itsouter end there is attached a screw rotating means in the form of acrank 170.

Rotation of screw 166 by crank 170 causes beam 160 to be moved forwardlyand backwardly moving frame structure 157 along with it, and as thisframe is moved it moves the lower ends of swing arms 150 to rotate thesearms on shaft 105 and shift upper roll 100 backwardly and forwardly. Thesingle manipulative control effected by the rotation of crank 170permits ready adjustment to control the longitudinal configuration ofthe transversely formed strip 36. This is in contrast to the dualadjustment required for the apparatus of FIGS. 9 and 10 in which the twoadjusting screws 123 must be manipulated separately but in substantialsynchronism. Yoke 152 is mounted upon a tubular member 171 which fitsand is movable only vertically within tubular portion 141 of supportbracket 140 just as in the case of the apparatus of FIGS. 9 and 10.Similarly, likewise, yoke 152 and the mechanism it carries may be raisedand lowered by rotation of adjusting screw 134 turning in a threadedhole in end plate 142 of tubular portion 141.

DRIVE OF THE APPARATUS Referring again in particular to FIGS. 1, 2, and3 it is to be noted that rotational drive from motor 22 is applied tothe lower rolls of the pairs of forming rolls carried in and on sideplates 60 and 61, and from these lower rolls only to upper rolls 71 and72. The pairs of rolls being affected by the drive motor are identifiedas 62-68, 6369, 6470, 65-71, and 66-72. As seen in FIGS. 1 and 2, aportion of drive shaft 27 carrying lower roll 65 extends appreciablybeyond side plate 60 and is rotated by means of motor '22 as the motordrives sprocket 23 on its own shaft, chain 24, and sprocket 25 fixedlymounted on the shaft 27 as the outermost of three sprockets on thisshaft. The outboard end of shaft 27 beyond sprocket 25 is carried inpillow block bearing 172 mounted on and supported by the upper frame 49.Rotational drive is transmitted from the extended portion of shaft 27 bymeans of roller chains and sprocket in a manner described hereinafter.

On shaft 27 is mounted an intermediate or middle sprocket 174 aroundwhich a roller chain 175 passes and further passes around an outersprocket 176 attached to an extended portion of shaft 177 of lower roll64. Also mounted on the aforementioned extended portion of drive shaft27 is an innermost drive sprocket 178 around which a roller chain 179passes. This chain, driven by sprocket 178, in turn drives a sprocket180 mounted upon an extended portion of shaft 181 of lower roll 66.Adjacent sprocket 176 and also carried on the extended portion of shaft177 of lower roll 64 is an inner drive sprocket 183 around which aroller chain 184 passes. This chain, driven by sprocket 183, in turndrives an inner sprocket 185 mounted upon an extended portion of shaft186 of lower roll 63. Mounted farther out on this shaft portion is anouter drive sprocket 188 around which a roller chain 189 passes. Thischain, driven by sprocket 188, in turn drives a sprocket 190 mountedupon an extended portion of shaft 191 of lower roll 62.

Referring particularly to FIGS. 2 and 3 it is to be noted that on thenear side of the apparatus as seen in FIG. 3 there is provided on anextended portion of drive shaft 27 a spur gear 193 which in turn ismeshed with a like spur gear 194 fixedly mounted upon an extendedportion of shaft 195 of upper roll 71. In like manner a spur gear 196identical to spur gear 193 is mounted on the near extended portion ofshaft 181 of lower roll 66, and drives a like spur gear 197 fixedlymounted upon an extended portion of shaft 198 of upper roll 72. Spurgears 193, 194, 196, and 197, as exemplified, all have the same pitchand diameter. No power drive is applied to either of rolls 100 and 104of strip coiling assembly just as none is applied to either of constantdiameter rolls 42 and 43 nor to either of the first pair of formingrolls 54 and 55.

USE AND OPERATION In the use of the afore-described apparatus, the stripof material 32 fed from coil 30 may, as aforesaid, be of stainless steelapproximately one-eighth of an inch thick and five and one-eighth incheswide, and it is brought initially from the coil through the pair ofconstant diameter rolls 42 and 43 which establish the plane ofoperation. These rolls perform no other function than insuring that thestrip as it is fed from the coil is brought into this plane in theelevation sense, and lateral guide rolls 45 and 46 insure that the stripis brought into proper side-to-side coincidence or alignment with itsprescribed path of travel through the apparatus. From the set ofconstant diameter or flat rolls 42 and 43 the strip is brought into thefirst pair of forming or bending rolls 54 and 55. These rolls areprovided to start a transverse bend in the strip or stock as shown inFIG. 7B, and insure that the bend is commenced in the correct directionand that the strip is in the determined pathway plane.

At this point, that is, after leaving rolls 54 and 55, the strip hasbeen reduced in plane width by perhaps as much as one-eighth of an inch,and is held in precise sideto-side alignment by lateral guide rolls 57and 58 in preparation for moving to enter between another pair or set offorming rolls. Upon entering the next pair of forming rolls 62 and 68,strip 32 is urged forwardly by lower roll 62 which is power driven whileupper roll 68 according to the adjustment of screw 76 directly below itinsures that the central transverse portion of the strip is urgedfurther downwardly as shown in FIG. 7C, and at the same time the sidesor edge portions of the strip are maintained in the predetermined plane.It is to be noted that rolls 62 and 68 are precisely shaped with thestrip forming contour or cavity between these rolls sized so that as thestrip is subjected to its next operation in being formed into its finalflanged, trough-like shape in its passage between rolls 62 and 68 it isnot reduced in thickness but instead is formed only in a transversebending mode.

The emerging strip is guided in the side-to-side sense by the pair oflateral guide rolls similar to rolls 57 and 58 next downstream which areprecisely spaced to accommodate the somewhat further reduced plane widthof the partly transversely formed strip. Continuing onward, the stripenters between the next pair of forming rolls 63 and 69 wherein afurther downward bending of its central transverse portion is effectedas shown in FIG. 7D, and an attendant slight but determinate drawingtogether of its edge portions. Again, and indeed throughout the wholeforming or transverse bending operation, there is no thinning of thestrip 32; that is, there is no rolling of it in the customary use of theexpression. This is prevented, while all desired bending is achieved, bythe shouldered configuration of the lower, power driven forming rollssuch as roll 63 taken together with the very rigid and preciselyadjustable means and method for rotatably supporting and verticallymoving the upper forming rolls such as roll 69, as describedparticularly in connection with FIG. 8.

The high degree of accuracy of the dimensions of the various componentsof the support means for upper forming roll 69 insures not only thatprecise adjustments may be made to the vertical position of this rolltaken as a whole, but also that its axis of rotation may and indeed willbe held accurately parallel to that of lower roll 63 so that the tworolls will exert essentially equal pressures on strip 32 from one edgeportion thereof to the other; that is, so that there will be no unduepinching of either edge portion of the strip between the rolls.Additionally, undue pinching of one edge portion or the other isprevented by the inventive feature of having only a single adjustment,namely, the turning of a single, directly acting screw 76, whereby thebearing blocks at both ends of the shaft on which upper roll 69 iscarried may be either raised or lowered simultaneously.

Another feature contributing to the precise management the transverseforming and linear forwarding of strip 32 are the pairs of lateral guiderolls such as 57, 58 and 82, 83. The rolls of successive pairs are setcloser and closer together, as may be seen generally in FIG. 2, tomaintain accurate side-to-side alignment of the strip in its prescribedforming and forwarding pathway as the plane width of the strip decreaseswith deeper and deeper bending as the strip passes from one pair offorming rolls to the next. Of course the shoulders on lower formingrolls 62, 63, 64, 65, and 66 also exert significant lateral guidance andcontrol on moving strip 32. The lateral guide roll pairs located betweenthe pairs of forming rolls serve in their turn the additional purpose ofkeeping the transversely bent strip leaving any pair of forming rollsfrom spreading out or springing back elastically, and thus make for arelatively easy entry of the strip into the shaping or bending cavitydefined between the rolls of the next pair of forming rolls downstream.

After leaving the pair of lateral guide rolls next downstream fromforming rolls 63 and 69, the partly formed strip 32 passes between rolls64 and 70 of the next forming roll pair, and is further shaped intransverse bending by these rolls. As with prior pairs of rolls thespace or cavity between rolls 64 and 70 is precisely sized so as tocause the strip to bend without being stretched or thinned. Upon leavingrolls 64 and 70 the partly formed strip may have a plane width of aboutfour and onequarter inches, and after passing between a pair of lateralguide rolls it enters the bending cavity defined between forming rolls65 and 71. At this stage, strip 32 is approaching its final shape so faras transverse bending is concerned, and it is desirable that no workhardening be induced in it by the dragging of upper roll 71 as the stripor stock runs over the lower roll. For this reason, and for the reasonof making sure that there is a fully positive drive on the strip to drawor thrust it through the whole, apparatus, both lower roll 65 and upperroll 71 are power driven. Upon leaving rolls 65 and 71 the nearlycompletely transversely formed strip 32 may have a plane width of aboutfour inches.

The strip passes next between a pair of lateral guide rolls mounted onthe last of the transverse bracing blocks 74, and enters the shapingpassage defined between forming rolls 66 and 72. Both of these rolls arepower driven, and strip 32 is bent to its final flanged, trough-liketransverse configuration by this pair of rolls. In this configuration itmay have a plane width of about three and seven-eighths inches, and theexit point lateral guide rolls 199 and 200 insure that the strip ismaintained in proper side-to-side alignment and not allowed to spreadopen from any residual elasticity as it enters between rolls and 104 ofstrip deflecting assembly or longitudinal curving or coiling assembly 35which, as pointed out hereinbefore, have contours and sizes identical tothose of forming rolls 72 and 66 respectively. The variable nature ofthe material being fed from coil 30 and the operations performed upon itin bending it transversely usually result in a formed strip having atendency to assume some curved or coiled longitudinal configuration.Therefore rolls 100 and 104 are adjusted to straighten the striplongitudinally, if that be what is desired, or else to impart apredetermined or controlled longitudinal curvature to it which may besignificantly different from the one which it would assume naturally.

Strip material formed to the transverse shape shown in FIG. 76, namely,a flanged, trough-like cross section, may

find significant use as a wrapping or lining to be wound around orfitted within and welded to either the exterior or the interior surfaceof a generally cylindrical vessel, and define thereon a conduit forcarrying fluids for either heating or cooling the contents of thevessel. When the transversely formed strip material is to be coiled tobecome a wrapping to be fitted to the exterior surface of a vessel ortank; that is, when the strip is to be coiled so that its trough-likeconfiguration is open or concave inwardly, adjusting screw 134 ismanipulated to cause the support yoke 108 in strip deflecting assembly35 or support yoke 152 in strip deflecting assembly 149 to be movedupwardly and bring the axis of lower deflecting roll 104 at leastsomewhat above the axis of the last lower forming roll 66. At the sametime the upper deflecting roll 100 is swung to the right, as seen inFIGS. and 13, toward the last upper forming roll 72 through manipulationof adjusting screws 123 or crank 170 whereby swing arms 110 or 150 arerotated clockwise. Adjusting screws 111 are set to give the appropriatespacing between the parallel axes of rolls 100 and 104, essentially thesame as that between the parallel axes of the rolls 72 and 66.

A little experimentation in any particular case will determine theproper vertical adjustment of the support yoke and the proper angularorientation of the swing arms to impart the desired curvature totransversely and longitudinally contoured strip 36 shown leavingdeflecting assembly 35 in FIG. 1 with its trough-like configurationconcave inwardly. Continued operation of the apparatus of FIG. 1 withthe indicated settings of adjusting screws 123 and 134 thereof willcause the finished strip 36 to be coiled into a helix. Desirably therewill be a bar or rod or other support means located above the apparatusat its .discharge end and running transversely to the strip formingpathway through the apparatus, this means acting to support the helix offinished strip 36 as the same is generated,

and allowing easy transfer of it onto a tank or other vessel to which itis to be finish fitted and welded after it has been cut off to thedesired length. Great flexibility together with precision of adjustmentis possible in setting the inside diameter of the helix of strip 36 togive it any desired degree of tightness of fit upon a given tank orvessel prior to being welded or otherwise attached thereto.

When the transversely formed strip material is to be coiled to become alining to be fitted to the interior surface of a vessel or tank; thatis, when the strip is to be coiled so that its trough-like configurationis open or concave outwardly, adjusting screw 134 is manipulated tocause the support yoke 108 in strip deflecting assembly 35 or supportyoke 152 in strip deflecting assembly 149 to be moved downwardly andbring the axis of lower deflecting roll 104 at least somewhat below theaxis of the last lower forming roll 66. At the same time the upperdeflecting roll 100 is swung to the left, as seen in FIGS. 10 and 13,away from the last upper forming roll 72 through manipulation ofadjusting screws 123 or crank 170 whereby swing arms 110 or 150 arerotated counterclockwise. Adjusting screws 111 are set to give theappropriate spacing between the axes of rolls 100 and 104, essentiallythe same as that between the parallel axes of rolls 72 and 66.

A little experimentation in any particular case will de termine theproper vertical adjustment of the suppork yoke and the proper angularorientation of the swing arms to impart the desired curvature totransversely and longitudinally contoured strip 36, a curvature oppositeto that of strip 36 leaving deflecting assembly 35 in FIG. 1 in that theopen or concave side of the strip is now directed outwardly rather thaninwardly. Continued operation of the apparatus of FIG. 1 with thesettings of adjusting screws 123 and 134 as described will cause thefinished strip 36 to be coiled into a helix. Desirably there will be abar or rod or other support means located beyond the apparatus at itsdischarge end at about the level of that end and running transversely tothe strip forming pathway through the apparatus, this means acting tosupport the helix of finished strip 36 as the same is generated, andallowing easy transfer of it into a tank or other vessel to which it isto be finish fitted and welded after it has been cut off to the desiredlength. The outside diameter of the helix may be set with precision togive it any desired degree of tightness of fit within a given tank orvessel prior to being welded or otherwise attached thereto.

Where the axis of lower deflecting roll 104 is just at the same heightas that of last lower forming roll 66 and swing arms or are orientedtruly vertically so that upper deflecting roll 100 is directly aboveroll 104, it may be expected that strip 36 leaving rolls 100 and 104will tend to assume some natural longitudinal curvature, one way or theother, because of the previous work history of the strip material. Thesupport yoke may be raised or lowered and the swing arms rotatedclockwise or counterclockwise as necessary to remove the naturalcurvature of the strip. Thus, deflecting or coiling assemblies 35- and149 may be used as straightening mechanisms when it is,

desired to produce straight runs of finished strip material 36 forattachment to a flat sheet or panel such as the side of a rectangularheating or cooling tank, for example.

CONCLUSION As the present invention may be embodied in several formswithout departing from the spirit or essential characteristics thereof,the embodiment herein pictured and described in detail is thereforeillustrative and not restrictive, and since the scope of the inventionis defined by the claims hereinafter set forth, all variations,modifications, and changes that fall within the metes and bounds of theclaims or that form their functional as well as conjointly cooperativeequivalents are therefore intended to be embraced by these claims.

Thus, protection by Letters Patent of this invention in all its aspectsas the same are set forth in the appended claims is sough to thebroadest extent that the prior art allows.

I claim as my invention:

1. In an apparatus for continuous forming of strip material having abase and at least one pair of mating, axially parallel transverseforming rolls rotatably mounted in and on said base with one roll ofsaid pair of rolls being further movably mounted in a manner allowingadjustment of the spacing between the axes of these rolls, theimprovement which comprises a yoke-like support and adjusting system forsaid one roll including (1) a hearing at either end of said one rollwherein this roll is rotatably carried, (2) blocks movable with respectto said base wherein said bearings are set, (3) at least one guide postextending from each of said bearing blocks past the other roll of saidpair of rolls and slidably guided in said base and extending beyond saidbase, (4) an adjusting plate joining said guide posts in theirextensions beyond said base, and (5) means operative between saidadjusting plate and said base whereby said plate, said guide posts, saidbearing blocks, said bearings, and said one roll all may be moved withrespect to said base and said other roll to controllably change theaxial spacing between said one roll and said other roll.

2. The improvement according to claim 1, there being a plurality ofguide posts extending from each of said bearing blocks.

3. The improvement according to claim 1, said base being of achannel-like configuration having side plates and a base plate; saidother roll being mounted in bearings set in said side plates, and saidbearing blocks for the bearings of said one roll being disposed beyondsaid side plates with said guide posts extending through and beingslidably guided in said side plates and said base plate.

4. The improvement according to claim 1 in which said means operativebetween said adjusting plate and said base is a single screw means.

5. The improvement according to claim 1 in which at least one of therolls of said pair of rolls is provided with step-like shoulder portionsat its ends to bear upon the other roll of said pair and limit the axialapproach of the two rolls one to another and thus always maintain atleast some opening between them.

6. In an apparatus for continuous forming of strip material wherein suchmaterial is initially formed transversely by being passed between therolls of at least one pair of mating, axially parallel rolls and whichapparatus has an assembly for forming the strip material longitudinallyafter it has been fully formed transversely, the improvement whichcomprises a longitudinal forming assembly adjustable to generate a helixof the transversely formed strip material in which a given originalsurface of the strip material may be wound either to the inside or tothe outside of the helix according to the adjustment of the assembly andincluding (1) a support member vertically adjustably mounted withrespect to the pair of rolls between which the strip material is finallytransversely formed and in spaced relation to these rolls in the generaldirection of travel of strip material being formed, (2) at least one armmember pivotably mounted on said support member, (3) means for adjustingthe angular orientation of said arm with respect to said support memberwhereby at least one end of said arm may be swung either relativelyclose to or relatively far away from said pair of rolls between whichthe strip material is finally transversely formed as compared to thespacing from these rolls of the pivot axis of said arm member on saidsupport member, (4) one longitudinal forming roll rotatably mounted onsaid support member and having its axis coincident with the pivot axisof said arm member and essentially parallel to the axes of the rolls ofsaid final pair of transverse forming rolls, and (5) anotherlongitudinal forming roll rotatably mounted on said arm member adjacentsaid swingable end thereof in axially parallel and spaced relation tosaid one longitudinal forming roll, said one and another longitudinalforming rolls together being generally so aligned with respect to saidpair of rolls between which the strip material is finally transverselyformed that material traveling from these transverse forming rolls mayenter directly between the longitudinal forming rolls, and the range ofvertical adjustment of said support means being such that thelongitudinal forming rolls may together be moved from an elevationsomewhat above to one somewhat below that of the final pair oftransverse forming rolls.

7. The improvement according to claim 6 in which said one an danotherlongitudinal forming rolls have mating contours essentially identicalfrom roll to roll of corresponding upper and lower rolls with those ofthe rolls of said pair of rolls between which the strip material isfinally transversely formed.

8. The improvement according to claim 6 in which said other longitudinalforming roll is movably mounted on said arm member so that its axialspacing from said one longitudinal forming roll may be controllablychanged.

9. The improvement according to claim 6 in which there are two spacedarm members pivotably mounted on the same axis on said support memberwith said other longitudinal forming roll being rotatably mounted on andbetween these arm members, and in which the means for adjusting theangular orientation of said arm members with respect to said supportmember comprises separate, individually manipulatable screw meansoperative between each of said arm members and said support member.

10. The improvement according to claim 6 in which there are two spacedarm members pivotably mounted on the same axis on said support memberwith said other longitudinal forming roll being rotatably mounted on andbetween these arm members, and in which the means for adjusting theangular orientation said arm 'members with respect to said supportmember comprises (1) a U-frame member the free ends of the side piecesof which are pivotably connected to said arm members in yoked relationtherto at points having turning radii around the pivot axis of the armmembers, and (2) a single adjusting screw means operative between saidU-frame member and said support member.

References Cited UNITED STATES PATENTS -18,058 8/1857 Raymond 721681,154,884 9/1915 Puppe 72-248 X 1,166,814 1/1916 Cleesattel 72--1681,478,772 12/1923 Stiefel 72-248 1,692,400 11/1928 Auble 72168 1,800,0234/ 1931 Kozicz 72l81 2,165,282 7/1939 Loggins 72-179 X 2,775,284 12/1956Hermann 72-179 X MILTON S. MEHR, Primary Examiner.

US. Cl. X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Dated 1111 y i, 1969 Patent No LL82 668 Inventor(I) Bernhard Vihl It is certified thaterror appears in the above-identified patent and that said LettersPatent are hereby corrected as shown below:

line 10: for "determination" read Column 8, line 6 4: for "17" read--1l7--; line 65: for "17" read --ll7--; line 71: for "1 4" read --llColumn 13, line 22: between "of" and "rolls" cancel "the" Column 16,line 2 (Claim 7, line 2): for "an danother" read --and another--. Column16, line 2'? (Claim 10, line 6): between "orientation" Column 1,--determinate--.

and "said" insert --of--.

SIGNED AND SEALED MAR 1 0 1970 Edward M. Fletcher, Ir.

wmxm E. rsauurmz, .m.

Attostmg Officer Commissioner of Patents

